The latest methods and precautions for earthing up Welsh onions

During the cultivation of Welsh onions, earthing up is necessary, because earthing up is an important measure for softening the leaf sheaths, preventing lodging, and improving the yield and quality of the white stalk. Reasonable earthing up of Welsh onions can not only increase the length of the white stalk, prevent lodging and bending, but also greatly improve the taste and quality of Welsh onions. So what should be noted when earthing up Welsh onions? Let's take a look together.

1. Timing of earthing up

Generally, earthing up can be carried out when Welsh onions have grown to about 30 cm. It should not be done too early, otherwise it will cause slow growth and bending of the Welsh onions. Earthing up is best done in the afternoon, because at this time the leaves are tender and will not be damaged. If this timing is missed, the leaves of the Welsh onions will be damaged during the earthing up process.

2. Reasonable topdressing

During the growth of Welsh onions, earthing up is generally required about 3 times. The first is light earthing up, with the thickness controlled at about 5 cm. It is generally carried out after the Welsh onions have grown to 30 cm and the white stalk has formed. You can apply 25 jin of compound fertilizer per mu together with 150 jin of organic fertilizer to encourage the roots to grow downward and meet the needs of the early growth of Welsh onions. When the Welsh onions have grown to 40-45 cm, carry out the second earthing up, with the thickness controlled at about 10 cm. This time, the topdressing for earthing up should mainly be nitrogen and potassium fertilizer to promote the growth of the pseudostem and leaves. The last earthing up is about 20 days before harvest. In order to improve the quality and taste of the white stalk, the thickness of the earthing up should be controlled at about 10 cm. At this time, do not add nitrogen fertilizer again, otherwise it will easily cause the white stalk of the Welsh onion to become soft and have a poor taste.

3. Earthing up method

The width of soil taken should not be too wide. Take soil from the middle of the rows, and the width of soil taken should not exceed one third of the row spacing. It should also not be too deep, so as to avoid damaging the roots. After earthing up, the soil should be patted firm to prevent it from being washed away and collapsing by rain. Earthing up is also not suitable when the soil is too dry or too wet. The pseudostem of the Welsh onion should be kept upright, so it is not suitable to earth up too deeply. At most, bury up to the leaf sheath, otherwise it will easily cause the white stalk to bend.

4. Pay attention to the season

Earthing up is not suitable in high-temperature seasons, otherwise the pseudostem will rot because it is buried too deeply in the soil. The number of times of earthing up should also not be too many. Frequent earthing up not only increases the workload, but also inevitably damages roots and leaves, affecting the growth of the straw. Do not earth up too deeply at one time, otherwise the leaves will be buried and rot very easily. Each earthing up should be 3-4 cm thick, and the soil should be earthed up to the boundary between the leaf sheath and the leaf blade, that is, only bury the leaf sheath, not the leaf blade.

The above is an introduction to the methods and precautions for earthing up Welsh onions. We hope it can help you. If you want to learn more related knowledge, please keep following us.